import java.util.Scanner;

public class C8 {
    public static void main(String[] args) {
        Scanner input=new Scanner(System.in);
        System.out.println("英寸转换厘米\n请输入英寸数");
        double a=input.nextDouble();
       final double b=2.54;
        System.out.println(a+"英寸="+b*a+"厘米");
    }
}
